Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5907122 | Gas insulated electrical apparatus | Keiichiro Nakamura, Takahide Watanabe, Masazumi Yamamoto | 1999-05-25 |
| 5898565 | Gas insulated switchgear apparatus | Takao Yamauchi, Masazumi Yamamoto, Kiyokazu Torimi | 1999-04-27 |